Question

Which geographic feature has helped isolate
China?
(1) Andes Mountains
(2) Kalahari Desert
(3) Himalaya Mountains
(4) Great Rift Valley

Answer 1

1) Andes are in South America, so it can't be.
2) Kalahari is in Africa
4) Great Rift Valley is also in Africa

So the only remaining answer is 3), and the Himalayas did in fact separate China from India!